Hair roller



FIG. 1 is a perspective view of a hair roller showing the new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is right-side view thereof;

FIG. 7 is left-side view thereof;

FIG. 8 is a front, bottom perspective view thereof; and,

FIG. 9 is a front elevation view showing the use of the hair roller.

The broken lines in the drawings are for purposes of illustrating environmental subject matter that forms no part of the claimed design. 

CLAIM The ornamental design for a hair roller, substantially as shown and described. 